import java.io.*;
class First extends Thread {
  First() {
    System.out.println("Starting first");
    start();
  }
  synchronized public void run() {
    new Second(this);
    try {
      wait();
    } catch (InterruptedException e) {}
    System.out.println("Wait ended");
  }
}

class Second extends Thread {
  First f;
  Second(First F) {
    f = F;
    System.out.println("Starting  second");
    start();
  }
  public void run() {
    System.out.println("entering sleep()");
    try {
      sleep(1500);
    } 
    catch(Exception e) {}
    synchronized(f) {
    f.notifyAll();
    }
  }
}

public class Threx44 {
  public static void main(String args[]) {
   char c;
   try
   {c = (char)System.in.read(); System.out.println(c);
   }
   catch (IOException e) {System.out.println("chyba cteni");
   }
   new First();
  }
}